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Aero A.45, a single-engined two-seat military reconnaissance aircraft for the artillery spotting role. The design features a high-wing monoplane with a fuselage that terminates immediately aft of the crew cabin, with the tailplane mounted on a boom attached to the wing. The tailwheel is mounted at the rear of the fuselage. The wing has leading-edge slots for good STOL capability. This arrangement maximises the observer's field of view. Another unusual feature is provision for a towing point to allow it to be towed by another, longer-range aircraft to enable it to be transported to a combat zone outside of its own range without having to stop and refuel. The first fight was on April 14 1946, it was evaluated against the Praga E.55. The Czech Air Force plans to begin operating the type during early 1948.
Length: 7.1 m (23 ft 4 in)
Wingspan: 10.5 m (34 ft 5 in)
Height: 2.46 m (8 ft 1 in)
Wing area: 15.1 m2 (163 sq ft)
Empty weight: 460 kg (1,014 lb)
Gross weight: 730 kg (1,609 lb)
Powerplant: one 105hp Walter Minor 4-III
Maximum speed: 171 km/h (106 mph)
Service ceiling: 4,370 m (14,337 ft)
Rate of climb: 2.333 m/s (459.3 ft/min)

Fokker-Avia B.161, a five-seat “Schnell bomber” developed from early 1939. In the conflict over Grand Uruguay, fast penetrating raids by bombers against high value targets proved very difficult to intercept and defeat. With a high maximum speed and cruise speed, the available time to intercept the bomber was limited. Expecting that nations may desire to emulate this model, Avia decided to develop a fast bomber. This proved more difficult than expected. Desiring a good bomb load and range, 2 tonnes at 1,000km was settled on. Minimal defensive armament and armour was provided to deal with any fighters that proved to be in their path. If only two were used, available engines could not propel the bomber at acceptable speeds, while 4 nacelles added considerable weight, cost and frontal area for a minimal bomb load than normally found on heavy bombers. So the Avia designers, probably influenced by their time working with Fokker engineers, settled on a twin-boom, central nacelle design with three engines- two pullers fronting the booms, and a pusher on the nacelle. While the pusher would only be 80% as effective due to disrupted airflow, the additional power came with no additional frontal area, and added considerably to performance. Adopting an oval cross-section for the fuselage, narrowing down in a teardrop towards the pusher, aided airflow to the prop, and allowed turrets to be placed on the top & bottom of the oval where they could fire past the blades.
Crew : 5 (Pilot, Co-pilot/radio, Bombardier/Navigator, Engineer/Dorsal gunner, Radio/Ventral gunner) Option for 6th crewmember.
Length: 16.74 m (55 ft 0 in)
Wingspan: 17.98 m (59 ft 0 in)
Wing area: 60.29 m² (649 ft²)
Empty weight: 8,292 kg (18,281 lb)
Max takeoff weight: 13,749 kg (30,313 lb)
Powerplant: 3 x 1517hp Minerva Paladin II v14-cylinder inline
Range: 2000 km (1,242 miles)
Maximum speed: 617km/h (384 mph) @ 5000m
Service ceiling: 11,430 m (37,500 ft)
Rate of climb : 826 m/m (2,711 ft/m)
Wingloading Loaded / Empty : 46.7 lbs/ ft², 37.9 lbs/ ft²
Armament: 4x13.2mm fore, Twin 13.2mm Turrets dorsal/Ventral 450rpg
Armour : 10mm bulkhead behind cockpit, self-sealing tanks
Payload : 2500kg at 1,000km (621mi), or 3,500kg at 500km (310mi)
Cost 1939: $126,000

Minerva -Avia Engines
Head Office and Works: LetHany
The Belgian firm of Minerva brought a controlling stake in Fokker-Avia’s engine division in the mid-1930s and the firm now builds under licence Minerva products as well as other manufacturers products. Minerva was known for its quality and “Knight” auto engines, essentially being a Belgian Rolls–Royce. The radials are primarily built in Czechoslovakia, both home designed and licensed copies. Inline engines are developed in Belgium by Minerva and built at both Belgian and Czech factories. These engines are available for export independent from the aircraft.

Products:
Paladin
While Minerva cut its teeth on licensed copies of the Hispano-Suiza 12Y, it has developed its own follow on, the “Paladin”. This is a 14-cylinder V-12 engine. In the 1930s, maximum supercharging for Avia inlines was limited to 4,000 and 5,000m. In the 1940s this has crept up to 6,000m and now Avia are developing a three-stage supercharger. The Paladin weighs roughly 1600lbs and runs on 94-Octane fuel.
1938 Paladin I 1327hp
1939 Paladin II 1517hp
1940 Paladin III 1592hp
1941 Paladin IV 1643hp

CKD-Praga (Ceskomoravská-Kolben-Dank Prague)
Head Office and Works: Praha-Karlin
The company was founded in 1915 as Praga, an engine manufacturing company. The company started designing aircraft in 1930–31 when the designers Pavel Beneš and Miroslav Hajn came to KD-Praga from Avia. Jaroslav Šlechta became chief designer in 1934.
Current Types:
Praga E.114, a two-seat high-wing monoplane single-engine sport airplane designed by Jaroslav Šlechta. Due to its light weight it is also called Air Baby. The prototype flew for the first time in September 1934 and series production started in 1935. There are several production variants; the basic E.114, the E.115 with a more powerful 75hp Praga D engine and enclosed cockpit and the E.117 with a tricycle undercarriage produced from 1940. Further development includes a variant powered by a Walter Micron III engine flown in 1943 as the E.118.
Length: 6.58 m (21 ft 7 in)
Wingspan: 10.90 m (35 ft 9 in)
Height: 1.65 m (5 ft 5 in)
Wing area: 15.20 m² (163.6 ft²)
Empty weight: 265 kg (584 lb)
Max takeoff weight: 465 kg (1,025 lb)
Powerplant: one 40hp Praga B2 Boxer engine
Maximum speed: 150 km/h (93 mph)
Range: 510 km (317 miles)
Service ceiling: 3,300 m (10,800 ft)
Climb to 3,000 m (9,800 ft): 43.7 min

Praga E.210, a four-seat tourer or air-taxi with a high wing cantilever monoplane, enclosed cabin for four ahead of the wing and a conventional tailwheel fixed undercarriage and twin fins. It has two engines close to the fuselage driving small propellers in a pusher layout. The wing is made in a single piece, a wooden structure built around two spars and plywood covered. The leading edge was significantly swept, but the trailing edge was straight with Schrenk type landing flaps. The Walter Minor engines were cantilevered from the rear spar on steel frames, with fairings both above and below the wings. The flat sided fuselage is built on a steel tube framework, the nose and the cabin were plywood skinned and the rest fabric covered. The prototype first flew in late 1936 with a single fin which was later altered and production began in March 1939
Length: 8.5 m (27 ft 11 in)
Wingspan: 12.5 m (41 ft 0 in)
Height: 2.07 m (6 ft 9 in)
Wing area: 17.5 m2 (188 sq ft)
Empty weight: 730 kg (1,609 lb)
Gross weight: 1,250 kg (2,756 lb)
Powerplant: two 85hp Walter Minor 4-cylinder air cooled inverted inline engines
Maximum speed: 230 km/h (140 mph)
Cruising speed: 210 km/h (130 mph)
Range: 600 km (373 miles)
Service ceiling: 4,500 m (14,764 ft)
Time to altitude: 13.6 min to 2,000 m (6,560 ft)

Praga E.211, a development of the E.210 with more powerful 105hp Walter Minor 4-111 engines, a central fin in addition to the endplates, tricycle undercarriage, better cabin access, with a starboard side door opening onto the front seats and a port side door for the rear seat passengers. Four passengers are accommodated plus the pilot. The prototype flew on 6 July 1943. A version for light freight was first flown in December 1943.

Praga E.55, a two-seat high-wing monoplane artillery spotter with a twin fin tailplane on a boom aft. Evaluated against the Aero A.345 during 1946. It is powered by a 105hp Walter Minor engine.

Hodek
Hodek HK-101, V. Hodek designed and produced the HK-101 high-speed two-seater monoplane. The pilot and passenger sit in tandem and the prototype was flown during September 1944. The HK-101 is powered by two 105hp Walter Minor engines.
Length 5.91 m (19 ft 3 in)
Wingspan: 7.7 m (25 ft 2 in)

Hodek HK P-1, a two-seat advanced trainer and courier aircraft based on the Hodek HK-101. It is powered by two 160hp Walter Minor 6-III engines for a maximum speed of 380 km/h (236 mph). First flown in 1948 and entered Czech Air Force service in 1949.

Letov (Vojenska Tovarna Na Letadla Letov)
Head Office and Works: Praha –Lethany
Letov was founded in 1918 by the Czechoslovakian Ministry of Defence to repair Great War-era aircraft. The first indigenous aircraft, the Letov Š-1, was designed and built in 1920. Letov is a partner in the production of the Aero A.350 airliner.
Current Types:
Š-50, a three-seat all-metal twin-engined low mid-wing monoplane with a fixed landing gear and twin fins. The prototype flew in May 1938 and production began in late 1939.
Powerplant: two 420hp Avia Rk.17 radials
Maximum speed: 305 km/h (190 mph)

Š-101, a small airliner powered by two Argus As 410 engines and seating 12 passengers and two crew. Designed in 1946, first flown January 1947 and certificated in June 1948.

Š-52, a single-seat jet-powered fighter. Development began in June 1947 and the first of three prototypes flew on 21 August 1949. The prototypes were followed by ten pre-production aircraft during 1950 and the type entered service with the Czechoslovakian Air Force in May 1951. The wings are swept and the 5,000lb thrust Rolls-Royce Nene III is fed from a nose intake and a single tail exhaust is fitted.
Wingspan: 12.50m
Length: 12m
Height: 3.70m
Empty weight: 2,214kg
Take-off weight: 5,760kg
Engine: 1x 5,000lb Rolls-Royce RB.41 Nene III
Maximum speed: 920km / h
Cruising speed: 760km / h
Landing speed: 160km / h
Service ceiling: 11,500m
Range: 1,000km
Armament: 2x 23mm GAST cannon plus 24x 55mm or 2x 210mm rocket projectiles or 2x 250kg bombs on two underwing hardpoints.

Škoda (Škoda Vojenska Tovarna Na Letadla)
Head Office and Works: Kunovice
The Škoda Works industrial concern in 1928 brought a share of Avia but later sold its holding to Fokker in 1931. Skoda then set about planning for its own aircraft division. Construction of the aircraft factory in Kunovice started in 1936 and was completed during 1938.
Current Types:
Škoda SK-3, a single-seat light aircraft with enclosed cockpit and fixed undercarriage and stubby fuselage. Only the prototype was flown, abandoned in 1939.

Škoda SK-8, a two-seat light cabin low-wing monoplane light aircraft with side-by-side seating and fixed undercarriage. The leading edge of the wing is swept and a first flight was undertaken on 16 January 1942 with production starting in February 1943.
Length: 6 m
Wingspan: 7.95m
Powerplant: one 105hp Walter Minor 4-111

Zlin Aircraft
Head Office and Works: Otrokovice Airfield, Otrokovice
The company was founded in 1934 and has specialised in gliders as both trainers and for sports purposes, but has since 1943 entered the light aircraft market. A small workshop on the site has begun manufacturing a series of light engines.

Weiss Manféd Rt.
Head Office and Works: Csepel Island, Budapest
The aircraft division of the Manfred Weiss industrial concern, one of the largest in Hungary, which was formed in 1928.
Current Types:
Weiss WM-10 Ölyv (Buzzard), a two-seat biplane primary trainer first flown in September 1931. The prototype was powered by a 100hp Weiss WW Sport I engine. The prototype was later modified with more powerful 120hp WM Sport II engine and improved landing gear. The production model was the WM-10a of 1933 and eight were built. One was built with as the WM-13 with a 130hp WM Sport III engine and larger fuel tanks. The EM-10 aerobatic trainer of 1934 had a Siemens Sh.12 radial engine and five were built.
Wingspan: 9.50 m (31 ft 2 in)

MSrE M-25, a two-seat sport aircraft with a low-wing cantilever monoplane wing of elliptical planform. The pilot and single passenger sit in tandem in an enclosed cockpit and a retractable undercarriage is fitted. It is powered by a 100hp Hirth HM 504 engine. A small series of five aircraft have been produced so far, with two exported to Egypt.

RMI-5, a four-engined monoplane airliner seating 20 passengers. In overall design it resembles the Focke-Wulf Fw-200. It is designed to be powered by four 480hp Argus As.411 engines. A first flight is planned for July 1943.

RMI-6 Szúgyog (Mosquito), an experimental aircraft to investigate light controls, has a tricycle-undercarriage and is powered by a 45hp Czech Zlin Persy II engine. A first flight is planned for June 1943.

EKW C-3604, a more powerful and heavier armed derivative of C-3603, powered by 1,245hp Saurer YS-2 V-12 and fitted an extra two 20mm cannon in the wings. First flown in late 1940 and production began in 1941.

In development:
D-3803, a further development of the D-3802 with a 1,500hp Sauer YS-3 engine, modified dorsal fuselage and an all-round visibility canopy. Morane-Saulnier is providing technical help in the development of this new fighter. The prototype made its first flight in late 1941. The Greek manufacturer KEA has a licence to produce the D-3803 via Morane-Sauliner. The Swiss Air Force took delivery of its first D-3803 during August 1943.
Length: 9.32m (30ft 7in)
Wingspan: 10.02m (32ft 10 1/2in)
Height: 3.33m (10ft 11in)
Wing area: 17.58m2 (190.4 sq. ft)
Empty weight: 2945kg (6,493lb)
Maximum weight: 3905kg (8,609lb)
Powerplant: one 1,500hp Saurer YS-3 V-12
Maximum speed: 680 km/h (422 mph) at 7,000 m (22,965 ft)
Service ceiling 12000m (39,370ft)
Range 650km (404 miles)
Armament: one 20 mm Hispano-Suiza HS.404 motorkanone and two wing-mounted 20 mm Hispano-Suiza HS.404 and 220kg (441lb) of bombs underwing

Flugzeugbau Farner A.G.
Head Office and Works: Grenchen (Soleure)
This firm was originally formed to undertake aircraft servicing and repairs and made its first aircraft, a two-seat light biplane, in 1934. From 1935 it produced a design of M. Weber, the WF.21/C4 four-seat monoplane.
In development:
WF.12, a two-seat light cabin monoplane, the engine is mounted in the rear fuselage and drives a tractor propeller via an extension shaft over the passenger cabin. The two pilots sit side-by-side and a fixed tricycle undercarriage is fitted. The first flight was in July 1941.
Length: 7.45 m (24 ft 5in)
Wingspan: 11 m (36 ft)
Height: 2.6m (8ft 6in)
Wing area: 16 m2 (172 sq ft)
Empty Weight: 560kg (1,232 lb)
Loaded Weight: 800kg (1,760 lb)
Powerplant: one 90hp Blackburn Cirrus Minor
Maximum speed: 175 km/h (109 mph)

FFA (Flug- und Fahrzeugwerke Altenrhein A.G.)
Head Office and Works: Altenrhein
FFA is an aircraft and railroad car manufacturing company, originally part of Dornier Flugzeugwerke in the early 1920s. FFA mainly manufactures Morane-Saulnier fighter aircraft for the Swiss Air Force under sub-contract from EKW.

Pilatus Flugzeugwerke A.G.
Head Office and Works: Stans, near Lucerne
Pilatus Flugzeugwerke is part of the Oerlikon-Buhrle organisation and was established at Stans in December 1939 with a capital of two million Swiss Francs. A founder’s syndicate was formed in 1938 under the leadership of Swiss industrialist and owner of Oerlikon M.E. Buhrle. The Chief Engineer was formerly employed at the defunct Comte company.
Current Types:
Pilatus P-1, a low-wing single-seat trainer. It first flew in mid-1941 and the Swiss Air Force brought 25 in 1942.
Wingspan: 9.5 m (31 ft 2 in)
Length: 6.9 m (22 ft 6 in)
Height: 2.1 m (6 ft 8 in)
Maximum Take-Off weight: 1150 kg (2,535 lb)
Powerplant: one 240hp Argus As.10C
Maximum speed: 280 km/h (173 mph)